Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

840DF8

ICAO 24-bit transponder address · allocated to Japan

Currently assigned to JA03WJ · AIRBUS A-350-1000

Hex
840DF8
Octal
41006770
Decimal
8,654,328
Country
JP
Tail
JA03WJ
Type
A35K
No current signal · last broadcast Jul 26, 19:20 UTC
Flights observed
149
Distinct callsigns
16
Country
JP
Last broadcast
Jul 26, 19:20 UTC

Last known position

Most recent position reported by Mode-S 840DF8.

Country allocation

The ICAO 24-bit address 840DF8 falls within the block assigned to Japan (JP) by ICAO Annex 10, Volume III. Every aircraft registered in Japan receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 16 distinct

Callsign Airline Flights Last seen
JAL3 Japan Airlines 15 2026-07-26
JAL11 Japan Airlines 15 2026-07-21
JAL4 Japan Airlines 14 2026-07-25
JAL12 Japan Airlines 14 2026-07-21
JAL5 Japan Airlines 12 2026-07-24
JAL44 - 12 2026-06-27
JAL16 - 12 2026-07-22
JAL15 Japan Airlines 12 2026-07-22
JAL6 Japan Airlines 11 2026-07-24
JAL43 - 11 2026-06-27
JAL46 - 8 2026-07-02
JAL45 Japan Airlines 8 2026-07-02
JAL8191 - 2 2026-06-15
JAL44D Japan Airlines 1 2026-06-16
JAL3D Japan Airlines 1 2026-06-02
JAL11D Japan Airlines 1 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JAL3 JFK → HND Jul 26, 05:50 UTCJul 26, 19:10 UTC13h 21m
2026-07-25 JAL4 HND → JFK Jul 25, 11:20 UTCJul 25, 23:25 UTC12h 5m
2026-07-24 JAL5 JFK → HND Jul 24, 17:55 UTCJul 25, 08:00 UTC14h 5m
2026-07-24 JAL6 HND → JFK Jul 24, 02:35 UTCJul 24, 14:35 UTC12h 0m
2026-07-22 JAL15 LAX → HND Jul 22, 22:05 UTCJul 23, 08:15 UTC10h 10m
2026-07-22 JAL16 - Jul 22, 00:25 UTCJul 22, 19:25 UTC19h 0m
2026-07-21 JAL11 DFW → HND Jul 21, 22:05 UTCJul 22, 19:25 UTC21h 20m
2026-07-21 JAL11 DFW → HND Jul 21, 20:05 UTCJul 22, 19:25 UTC23h 20m
2026-07-21 JAL11 DFW → HND Jul 21, 18:05 UTCJul 22, 18:00 UTC23h 55m
2026-07-21 JAL11 DFW → HND Jul 21, 17:25 UTCJul 22, 00:50 UTC7h 25m
2026-07-21 JAL12 HND → DFW Jul 21, 02:05 UTCJul 21, 13:20 UTC11h 15m
2026-07-19 JAL15 LAX → HND Jul 19, 22:35 UTCJul 20, 09:00 UTC10h 25m
2026-07-19 JAL16 - Jul 19, 10:00 UTCJul 19, 19:50 UTC9h 50m
2026-07-18 JAL11 DFW → HND Jul 18, 19:15 UTCJul 19, 07:30 UTC12h 15m
2026-07-18 JAL12 HND → DFW Jul 18, 04:40 UTCJul 18, 16:25 UTC11h 45m
2026-07-15 JAL3 JFK → HND Jul 15, 05:55 UTCJul 15, 19:05 UTC13h 10m
2026-07-14 JAL4 HND → JFK Jul 14, 11:00 UTCJul 15, 00:05 UTC13h 4m
2026-07-13 JAL5 - Jul 13, 17:55 UTCJul 14, 07:15 UTC13h 20m
2026-07-13 JAL6 HND → JFK Jul 13, 02:40 UTCJul 13, 14:45 UTC12h 5m
2026-07-12 JAL3 JFK → HND Jul 12, 05:55 UTCJul 12, 19:01 UTC13h 5m
2026-07-11 JAL4 HND → JFK Jul 11, 10:55 UTCJul 11, 23:25 UTC12h 30m
2026-07-10 JAL5 JFK → HND Jul 10, 17:55 UTCJul 11, 06:50 UTC12h 55m
2026-07-10 JAL6 HND → JFK Jul 10, 02:25 UTCJul 10, 14:50 UTC12h 25m
2026-07-08 JAL5 - Jul 8, 17:55 UTCJul 9, 06:45 UTC12h 50m
2026-07-08 JAL6 HND → JFK Jul 8, 02:25 UTCJul 8, 14:25 UTC12h 0m
2026-07-06 JAL15 - Jul 6, 21:50 UTCJul 7, 08:25 UTC10h 35m
2026-07-06 JAL16 HND → LAX Jul 6, 09:05 UTCJul 6, 18:25 UTC9h 20m
2026-07-05 JAL11 DFW → HND Jul 5, 17:30 UTCJul 6, 06:35 UTC13h 5m
2026-07-05 JAL12 HND → DFW Jul 5, 02:15 UTCJul 5, 13:20 UTC11h 5m
2026-07-04 JAL3 JFK → HND Jul 4, 06:00 UTCJul 4, 18:45 UTC12h 45m
2026-07-03 JAL4 HND → JFK Jul 3, 10:55 UTCJul 3, 23:10 UTC12h 15m
2026-07-02 JAL46 - Jul 2, 18:55 UTCJul 3, 07:30 UTC12h 35m
2026-07-02 JAL45 HND → CDG Jul 2, 01:45 UTCJul 2, 15:30 UTC13h 45m
2026-06-30 JAL46 - Jun 30, 19:25 UTCJul 1, 08:10 UTC12h 45m
2026-06-30 JAL45 HND → CDG Jun 30, 02:10 UTCJun 30, 15:50 UTC13h 40m
2026-06-29 JAL3 - Jun 29, 05:54 UTCJun 29, 18:55 UTC13h 0m
2026-06-28 JAL4 HND → JFK Jun 28, 11:14 UTCJun 28, 23:25 UTC12h 10m
2026-06-27 JAL44 - Jun 27, 19:00 UTCJun 28, 07:40 UTC12h 40m
2026-06-27 JAL43 HND → LHR Jun 27, 01:15 UTCJun 27, 14:39 UTC13h 25m
2026-06-25 JAL15 - Jun 25, 21:10 UTCJun 26, 08:30 UTC11h 20m
2026-06-25 JAL16 HND → LAX Jun 25, 09:05 UTCJun 25, 18:15 UTC9h 10m
2026-06-24 JAL11 DFW → HND Jun 24, 17:25 UTCJun 25, 06:00 UTC12h 35m
2026-06-24 JAL12 HND → DFW Jun 24, 02:34 UTCJun 24, 13:10 UTC10h 35m
2026-06-22 JAL46 - Jun 22, 18:54 UTCJun 23, 07:35 UTC12h 40m
2026-06-22 JAL45 HND → CDG Jun 22, 01:55 UTCJun 22, 15:45 UTC13h 50m
2026-06-20 JAL15 - Jun 20, 21:25 UTCJun 21, 08:15 UTC10h 50m
2026-06-20 JAL16 HND → LAX Jun 20, 09:14 UTCJun 20, 17:59 UTC8h 45m
2026-06-19 JAL11 DFW → HND Jun 19, 18:05 UTCJun 20, 06:29 UTC12h 25m
2026-06-19 JAL12 HND → DFW Jun 19, 02:14 UTCJun 19, 13:54 UTC11h 40m
2026-06-18 JAL5 - Jun 18, 08:25 UTCJun 18, 09:10 UTC45m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the JA03WJ page for operator, model, and routing details .

Mode-S 840DF8 frequently asked

What is Mode-S code 840DF8?
840DF8 is an ICAO 24-bit transponder address. Allocated to Japan. Assigned to JA03WJ.
Where is Mode-S 840DF8 registered?
Mode-S code 840DF8 is allocated to Japan (JP). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 840DF8 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 840DF8, octal 41006770, decimal 8,654,328.
What flights does 840DF8 operate?
Mode-S 840DF8 has broadcast 16 distinct callsigns, including JAL3, JAL11, JAL4, JAL12, JAL5.